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Toronto retaining wall permits

Do you need a permit for a retaining wall in Toronto?

Check Toronto retaining-wall permit rules, including the 1 metre threshold, public-access conditions and when a private wall can be exempt.

2 min readReviewed Oct 1, 2026
The short answerConditional

It depends on height and where the wall is located or accessible.

Toronto lists certain retaining walls more than 1 metre high in public or publicly accessible contexts as permit-required, while private walls that are not accessible to the public and/or are under 1 metre can be permit-exempt.

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Know what matters

What changes the answer.

Start with these conditions. The official reference is attached to each one.

Height1 metre is an important thresholdConditional

Toronto's examples distinguish retaining walls above and below 1 metre.

Official sourceCity of TorontoWhen Do I Need a Building Permit? · Permit-required and permit-exempt project examples
Verified2026-10-01Open proof
Public contextCan trigger permit reviewConditional

Walls on or adjacent to public property, building entrances or private property accessible to the public can fall into the permit-required example.

Official sourceCity of TorontoWhen Do I Need a Building Permit? · Permit-required and permit-exempt project examples
Verified2026-10-01Open proof
Private / non-public wallCan be exemptLikely allowed

Toronto lists private retaining walls not accessible to the public and/or under 1 metre among permit-exempt examples.

Official sourceCity of TorontoWhen Do I Need a Building Permit? · Permit-required and permit-exempt project examples
Verified2026-10-01Open proof

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Preparation checklist · Reviewed 2026-10-01

Fees and timing

TimelineMeasure the full exposed height and confirm whether public property, entrances or public access are involved before design and excavation.
FeesPermit fees depend on the applicable structural permit class. Confirm the current fee once the wall is classified.

Next steps

  1. Measure maximum wall height
  2. Map the wall relative to public property and entrances
  3. Confirm public accessibility
  4. Obtain structural design where required

A few questions you might have.

Is a retaining wall under 1 metre permit-exempt in Toronto?

Toronto lists retaining walls under 1 metre among examples that can be permit-exempt, subject to the stated location and access conditions.

Does a retaining wall beside a sidewalk need more review?

Potentially. Toronto's permit-required example specifically calls out walls on or adjacent to public property and other public-access contexts.

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